Sam Johnson suffered a knee injury in Glasgow's defeat to Munster last weekend and is expected to be out for 10-12 weeks.

Glasgow Warriors Head Coach Dave Rennie said: "We're excited by the challenge this week. What we know is that regardless of who pulls on the jersey there is an expectation to perform in it and we've named a strong squad that can go out there and deliver.

"Ospreys are right on our tails in the Conference and are playing really well. We'll need to reach the same levels of physicality we have done in our last three games to get the performance we expect from a Glasgow Warriors side.

"It's tough for Sam (Johnson), he's just returned from injury so to injure his other knee is disappointing for him. He's a determined man and has already begun work on his rehab and we look forward to having him back fit."